package cn.com.klun.tjy.other.jvm;

/**
 * volatile 变量自增运算测试
 */
public class VolatileTest {

    public static volatile int race = 0;

    public static void increase(){
        race++;
    }
    //规定开启的线程数量
    private static final int THREADS_COUNT = 20;

    public static void main(String[] args){
        Thread[] threads =  new Thread[THREADS_COUNT];
        for (int i = 0; i < THREADS_COUNT; i++) {
            threads[i] = new Thread(new Runnable() {
                @Override
                public void run() {
                    for (int j = 0; j < 10000; j++) {
                        increase();
                    }
                }
            });
            threads[i].start();
        }

        // 等待所有累加线程都结束
        while (Thread.activeCount()>1){
            Thread.yield();
        }
        System.out.println(race);
    }
}
